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New way to save endangered sharks — and our seafood A shark - Copyright: Panos Illegal fishing of protected sharks is fuelled by high prices paid for fins A new genetic tool can track illegal fishing of endangered sharks Saving sharks can also help save marine ecosystems and our seafood By: You have to credit our authors.
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For more information view our media page and republishing guidelines. The full article is available here as HTML. This is important because sharks are top predators that keep the marine ecosystem in check, helping to sustain the food web that supports millions of people worldwide who rely on seafood sustenance.
Although shark fishing is banned in Brazil, the clandestine market continues, driven partly by the high prices shark fins fetch: Fishermen engaged in illegal fishing of sharks usually resort to finning: Until now, it has been hard to tell whether the fins come from protected sharks, as they might look quite similar when severed.
In a study published in Fisheries Researchresearchers used DNA barcoding, a genetic tool able to analyses short segments of about base pairs of the mitochondrial genome, for distinguishing different species of sharks.
By doing so, scientists were able to link many of the samples to three protected shark species: Squatina guggenheim, Squatina occulta and Pseudobatos horkelii.
All of them are listed as endangered or critically endangered on the International Union for Conservation of Nature IUCN Red List of Threatened Species, an inventory of the global conservation status of plant and animal species and subspecies. The capture, transportation, storage, handling, processing, and trade of these shark species — that are already experiencing drastic population declines — has been prohibited in Brazil since The authors propose that this method could be used by local authorities, so fishermen who catch and commercialize endangered species are sanctioned.
He says sharks are sensitive to overfishing because they grow slowly, take a long time to mature, and have few offspring — a bit like mammals such as humans.
About million sharks are caught and killed by humans annuallyaround 7 per cent of the total population, which is not naturally sustainable.
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The decline in sharks has knock-on effects that might negatively affect human wellbeing too. It plays havoc with the ecosystem and the consequences may extend to local people who depend on marine biodiversity for income and as a source of food. By removing a top predator, their prey can burgeon and compromise the food chain all the way down, affecting seafood consumed by people, the study says.
You might also like.Selection Methodology. The Global Ecoregions are the results of regional analyses of biodiversity across the continents and oceans of the world, completed in collaboration with hundreds of regional experts worldwide and by conducting extensive literature reviews.
An endangered species is any animal or plant species whose very survival is threatened to the point of extinction. Once extinct, a species is no longer found anywhere on Earth.
Once gone, it is gone forever. Throughout Earth's geological history species have become extinct naturally. However, in. The Center for Biological Diversity works through science, law and creative media to secure a future for all species, great or small, hovering on the brink of extinction.
The World Bank Group works in every major area of development. We provide a wide array of financial products and technical assistance, and we help countries share and apply innovative knowledge and solutions to the challenges they face. Journal of Biodiversity and Endangered Species discusses the latest research innovations and important developments in this field.
Related Journals of Endangered plants & animals. Journal of Wildlife Management, Endangered Species Research, Erkwit and El Gaab Oasis) Ikram Madani Ahmed. Climate Change Mitigation and Adaptation.
The law gives the Department of Homeland Security (DHS) authority to waive any laws – including the Endangered Species Act and National Environmental Policy Act – that slow the wall’s.